Question

What is the force of gravitational attraction between an object with a mass of 100 kg and another object that has a mass of 300 kg and are at a distance of 2m apart

Answer 1

Answer:

5 x 10⁻⁷N

Explanation:

Given parameters:

Mass of object 1  = 100kg

Mass of object 2 = 300kg

Distance  = 2m

Unknown:

Force of gravitational attraction between the objects  = ?

Solution:

From Newton's law of universal gravitation we derive an expression:

        Fg  = $\frac{G m_{1} m_{2} }{r^{2} }$

G is the universal gravitation constant = 6.67 x 10⁻¹¹

m is the mass

r is the distance between the bodies

 Now insert the parameters and solve;

     Fg  = 6.67 x 10⁻¹¹ x $\frac{100 x 300}{2^{2} }$   = 5 x 10⁻⁷N